FI67715C - HAZARDARA BLANDNINGAR INNEHAOLLANDE EN POLYEPOXIDFOERENING OCHEN HAERDARE - Google Patents

Abstract

(Dimethylaminoalkyl)carboxylic and -carbamic acid esters and (dimethylaminoalkyl) ethers and ureas are compounds which are especially suitable for use as amine curing agents for polyepoxide compounds. They impart longer curing times to the curable mixtures and thus good processing properties, especially when the mixtures are used as adhesives. In addition, the mechanical properties are often improved. Further, these compounds afford advantages when used as curing agents on account of their low volatility.

Description

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Patent- cth registerttyralsm AmtUun utlagd od * udjkrifMn published 31 .01 .85 (32K33) (31) Pyydetty atuoikaut-BacInl prtorkat 1 0.04.79

Switzerland-Switzerland (CH) 3405/79 * 8 (71) Ciba-Geigy AG, CH-4002 Basel, Switzerland-Switzerland (CH) (72) Helmut Zondler, Bottmingen, Roland Moser, Basel, Switzerland-Switzerland (CH) ( 74) Oy Jalo Ant-Wuorinen Ab (54) The present invention relates to curable compositions comprising (dimethylaminoalkyl) carboxylic acid esters ethers and ureas, as amine hardeners in poly-epoxy compounds having on average more than one epoxide group in the molecule.

Epoxy resins are widely used in various technical fields, such as surface protection, the electrical and construction industries, as adhesives, binders and mold resins. In addition to various common additives, epoxy resins contain hardeners, the composition of which is determined, for example, by working conditions, field of application and product properties.

It is known that N, N-dialkyl-1,3-propylenediamines are added as hardeners either alone (DE 961 029) or together with "polyamide resins" (CH 362 526). Although these 1,3-propylenediamines have proven to be well cured, there are drawbacks to their use. They are relatively low-boiling substances that partially evaporate during the manufacture of epoxy resins and cause dangerous odor nuisances. These can only be removed incompletely using a suction device. On the other hand, carbonate precipitation caused by moisture and carbon dioxide is often observed in manufacturing machines.

The N, N-dialkyl-1,3-propylenediamines are still relatively reactive, so that after mixing the components, the viscosity range is reached too early, so that the mixture can no longer be processed. Such viscosity is often reported during the clotting time, which in this case is thus far too low, which means technical disadvantages.

It has already been proposed to use N, N-dimethyl-1,3-propylenediamine as a hardener in polyethoxide compositions used as adhesives. Although very good adhesion is obtained, there is a need to improve the adhesive effect in order to expand the fields of application.

The present invention relates to curable compositions comprising (a) a polyepoxide compound having on average more than one epolide group in the molecule, and (b) a hardener for preparing hardened products, characterized in that the hardener is a dimethylamino derivative of the formula

H, C

3'-X-R (1) h3c wherein X is 1,3-propylene or ethylene or methyl-substituted ethylene, and R corresponds to the formula 0 0

li II

(CH3) 2N-X-OCO- (II), K CO- (111), 0 0 o

Il II 2 3 II

(CH3) 2N-X-OCYCO- (IV), R k is NCO- (V), is II, (CH3) 2N-X-OCNH-Y-HNCO- (VI), -OR (VII), 0 Q q 11 in RR NCNR (Vili) t * 0 o

II il (CHJNN-X-NHCNH- (Y-NHCNH) - (IX) or J 2 n 3 6771 5 -ORRXXN (CH) 2 (X) 1 J 1 wherein R represents alkyl or unsubstituted aryl, Y is 2 alkylene or arylene, R is a hydrogen atom or is the same as 3 3 R, and R is alkyl, cycloalkyl or unsubstituted 4 aryl, and R is alkyl, cycloalkyl, aralkyl, CH 2 -CH-Z or έ 5 CH-CH-Z, wherein R * represents a hydrogen atom or methyl and Z is CN, R 5 CH 2 NH 2 or CH 2 N (CH 1) 2, n is 0 or 1, R 10 and R 1 are hydrogen and R 9 is alkyl, aryl or 3- (dimethylamino) propyl , or R 1 is a hydrogen-9 atom, R is alkyl and R is 11-β-cyanoethyl substituted in the 1- or 2-position by methyl and R is cycloalkylene.

A preferred group are those mixtures wherein X in formula (I) is ethylene or methyl-substituted ethylene and R corresponds to formulas (II) to (VII).

Another preferred group are those mixtures wherein X in formula (I) is ethylene or 1,3-propylene and R corresponds to formulas (VIII) and (IX).

R in formula (III) is preferably -C 1 -C 4 alkyl, especially C 1 -C 4 alkyl or phenyl.

b 2 3

In the formula (V), R preferably represents a hydrogen atom and R represents a C 1 -C 3 alkyl, cyclohexyl or phenyl, or R and R represent ethyl.

4

In formula (VII), R is preferably C 1 -C 4 alkyl, cyclohexyl, benzyl, β-cyanoethyl, γ-aminorpopyl or γ-dimethylaminopropyl.

In formulas (VI) and (IX), Y preferably represents C 1 -C 4 alkylene, phenylene or 2,4-toluylene.

In formula (VIII), R 10 and R 6 are preferably a hydrogen atom and R 9 is C 1-8 C 1-4 alkyl or C 1 -C 4 aryl or R is a hydrogen atom, R n -butyl or phenyl and R ** ® is 2 methyl-substituted β-cyanoethyl.

Examples of alkyl groups which may be linear or branched are: methyl, ethyl, propyl, i-propyl, n-, i- or t-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tetradecyl , octadecyl.

Examples of alkylene groups which may be linear or branched are: methylene, ethylene, 1,2- or 1,3-propylene, 1,2-, 1,3- or 1,4-butylene, pentylene, hexylene, 2-ethylbutylene -lene, octylene, dodecylene, octylethylene, dodecylethylene. The cycloalkylene may preferably be cyclopentylene, cycloheptylene, cyclooctylene and especially cyclohexylene. Arylene is preferably o-, m- and p-phenylene and naphthylene which may be substituted by C 1 -C 4 alkyl.

4 6771 5

Cycloalkyl which may be substituted by alkyl groups having 1 to 4 carbon atoms is, for example, cyclopentyl, cycloheptyl, cyclooctyl and especially cyclohexyl.

Aryl, by itself or in aryl-containing groups, is preferably naphthyl and especially phenyl. Examples of aralkyl, alkyl or alkaralkyl are methyltenyl, methylfatyl, dimethylphenyl, diethylphenyl, ethylphenyl, butylphenyl, di-butylphenyl, octylphenyl, nonylphenyl, ethylmethylphenyl, benzyl, β-phenyl, β-phenyl , dibutylbenzyl or nonylbenzyl.

The preparation of the dimethylamino derivatives of the formula (I) is carried out according to known methods in equipment commonly used for this purpose.

The ethers are obtained, for example, by etherification of alcohols of the formula (CH 2 -NX-OH with alcohols of the formula R-OH in the presence of a water-separating agent, or by reaction with halides of the formula RA in which A is halogen, preferably chlorine or bromine, optionally in the presence of catalysts or by coupling an alcohol of the formula (CH 2 -NX-OH) with the corresponding olefinically unsaturated compounds.

Esters are obtained by esterifying or reacting an alcohol of formula (CH3) 2N-X-OH with mono- or dicarboxylic acids or their ester-forming derivatives, e.g. anhydrides, esters or acid halides, optionally in the presence of catalysts.

Carbamic acid esters are obtained by coupling of the formula (CH 2) -N-X-OH

J ^ 2

alcohols to mono- or diisocyanates. N-substituents R

3a 3a R can also be coupled after these reactions by reaction with the corresponding halides or olefinically unsaturated compounds.

Urea can be obtained by reacting mono- or diisocyanates with amines of the formula (CH 2) N -X-NH, or by reacting these amines with optionally R- or R-substituted ureas. The groups R, R and R can also be attached after these reactions by reaction with the corresponding halides or olefinically unsaturated compounds.

Il 6771 5 The starting materials The alcohols and amines used are resinable or readily available by coupling epoxides or acrylonitrile, methacrylonitrile or crotoninitrile to dimethylamine, whereupon the resulting nitriles are finally hydrogenated to amines.

The dimethylamide derivative of formula (i) is generally added to the curable compositions in an amount of 0.1 to 10 parts by weight, preferably 0.1 to 20 and especially 1 to 11 parts by weight based on the polyepoxide compound present. They can be used alone or in combination with other hardeners, often causing them to harden as accelerators. Known quenchers include, for example, acids such as di- and polycarboxylic acids, carboxylic acid anhydrides, polyhydric alcohols and phenols, polyamides, so-called laminaldehyde and urea-formaldehyde condensates, polyamines, polyisocyanates, amino resin. condensate -r; it. Other suitable hardeners are, for example, polyaminoamides prepared from di- or trimerized fatty acids and aliphatic nolyamines (cf. CH-PS 16.2 126). When curing is used as an accelerator or in combination with other cures, 0.1 to 1 part by weight based on the polyepoxide compound is usually sufficient.

Lymethylamines can also be used in the form of coupling products, e.g. together with a liquid butylene-nitrile copolymer per month containing a carboxyl group at the terminal position. If hard cores contain active hydrogen bound to the II-a tower, ni i.r. enters the curable alloys, preferably 0.5-1.1 equivalents, differently boring about one equivalent per 1 K of these K-ators to the enλκ side ring.

Suitable polyepoxide compounds in the curable compositions according to the invention are, in particular, those which have on average more than one glycidyl group, a β-methylglycidyl group or a 2,3-epoxy cyclopentyl bonded to a heteroatom (e.g. a sulfur, preferably an oxygen or nitrogen atom). a group particularly noteworthy are bis- (2,3-epoxycyclopentyl) ether; di- or polyglycidyl ethers of polyhydric aliphatic alcohols such as 1H, butanediol or polyalkylene glycols, such as polypropylene glycol; di- or polyglycidyl ethers of cycloaliphatic polyols such as 2,2-bis- (U-hydroxycyclohexyl) -pronane; polyvalent phenols such as resorcinol, bis- (p-hydroxyphenyl) methane, 2,2-bis- (p-hydroxyphenyl) propyl (= diomethane), 2,2-bis - ('e-' -hydroxy) Condensation products of -3 ', o'-dibromo-phenyl) -propane, 1,1,2,2-tetrakis- (υ-hydroxyphenyl) -ethane or phenols and formaldehyde obtained under acidic conditions, such as phenol-novolak and cresol di- or oliglycidyl ethers of novolak; di- or poly (β-methylglycidyl) ethers of the aforementioned higher alcohols or polyhydric phenols; polyglycidyl esters of polyvalent.-carbonic hops such as phthalic acid, terephthalic acid, Δ »+ tetrahydrophthalic acid and hexahydrophthalic meat; N-glycidyl derivatives of amine, amide and heterocyclic nitrogen bases such as Ν, Ν-diglycidylaniline, K, Ν-diglycidyltoluidine, N, N, N ', N'-tetraglycidyl-bis- (p-aminophenyl) -methane ; triglycidyl - isocyanurate; Ν, Ν'-diglysidyylietyleenikarbamidi; N, N'-diglycidyl-d, 5-dimethylhydroxy, 11'-N'-di glycidyl -5-isopropylhydantoin; N, N-diglycidyl-5,5-dimethyl-6-isopropyl-5,6-dihydro-uracils.

If desired, to reduce the viscosity of the polyepoxides, active diluents such as styrene oxide, butyl glycidyl ethers, isooctyl glycidyl ether, phenylglycidyl ether, cresyl glycidyl ether

The curing of the curable compositions according to the invention to the shape pieces and the like takes place expediently in the temperature range from 20 to 160 ° C. The curing can also be carried out in a known manner in two or more steps, the first curing step being carried out at a lower temperature and the subsequent curing at a higher temperature.

In many cases, the clotting or curing times of the compositions of the invention can be shortened, if desired. In this case, substances known to accelerate the amine curing can be added, e.g. mono- or polyphenols, such as phenol or diomethane, salicylic acid or salts of rhodanehydric acid, such as NH4C.

Conventional modifiers such as diluents, fillers and reinforcing agents, pigments, colorants, organic solvents may also be added to the curable compositions of the invention containing poly-epoxide compounds and a dimethylamino derivative of formula (I) prior to final curing at any stage. -

II

7,67715 gauges, flow regulators, thixotropics, flame retardants, mold release agents.

Examples of diluents, reinforcing agents, fillers and pigments which can be added to the curable compositions according to the invention include coal tar, bitumen, liquid coumarone-indene resins, textile fibers, glass fibers, asbestos fibers, boron fibers, carbon fiber, cellulose fibers, cellulose fibers, cellulose fibers, cellulose fibers, cellulose fibers, sijauho-quart; mineral silicates such as mica, asbestos flour, shale flour; kaolin; alumina trihydrate, chalk flour, gypsum, anti-poly trioxide, bentonite, silica aerogel ("AER03IL"), lithopones, barite, titanium dioxide, carbon black, graphite, oxide dyes such as iron oxide or metal powders such as aluminum powder.

Suitable for modifying mixtures which harden into organic solvents are, for example, toluene, xylene, n-propanol, butyl acetate, acetone, methyl ethyl ketone, diacetonal alcohol, ethylene glycol monomethyl ether, monoethyl ether and monobutyl ether.

Dibutyl, dioctyl and dinonyl phthalate, tricresyl phosphate, trixylenyl phosphate, diphenyloxyethyl formal and polypropylene glycols can be used, for example, to modify the curable compositions.

Silicones, liquid acrylic resins, cellulose acetobutyrate, polyvinyl butyrate, waxes, stearates, etc. (which are also suitable as mold release agents) can be added to the composition of curable compositions as flow control agents, especially in surface protection.

In particular, when used as varnishes, the nolyepoxide compounds can be partially esterified, in a known manner, with carboxylic acids, in particular higher, unsaturated fatty acids. It is also possible to add other synthetic resins, e.g. phenomoplastics or amino plastics, to such lacquer resin compositions.

The preparation of the curable compositions according to the invention can be carried out in the customary manner by means of known mixing devices (mixers, agitators, rollers).

The curable epoxy resin compositions according to the invention are used in particular in surface protection, electrical engineering, lamination processes, the adhesive industry and the construction industry. They can in particular be used in a composition which is particularly suitable for the intended use, in filled or unfilled form, optionally in the form of solutions or emulsions, as coatings, varnishes, compression masses, injection preparations, immersion resins, casting resins, impregnating resins, as masses, floor covering masses and as a binder for mineral aggregates.

Preferably, the compositions according to the invention are used as laminating resins and in particular as adhesive resins.

Dimethylamino derivatives can be liquid - viscous or crystalline substances which are difficult to volatilize and, even in the preparation of the compositions according to the invention, they have little volatility, so that there are hardly any odor nuisances. The non-curable compositions according to the invention surprisingly have a longer clotting time (i.e. improved workability) than those compositions containing N, N-dimethyl-1,3-propylenediamine, whereby equally good and partly better adhesions are achieved when used as an adhesive resin.

The following examples further illustrate the invention:

Preparation Examples Example 1 R-Dimethylaminoethyl p-cyanoethyl ether

(CH3) 2NCH2CH20CH2CH2CN

To a mixture of 356.5 g of 2-dimethylaminoethanol and 5 ml of Triton B is added dropwise 2 l of 3 g of acrylic nitrile over 15 minutes, warming the mixture from room temperature to 75 ° G. The mixture is then heated at 95 [deg.] C. for 3 hours, while a further 5 ml of Triton B are added and the remaining premix is distilled. 3-51.3- g (79% by weight) of a product obtained by gas chromatography are obtained; B.p. 102 ° C / 3 torr.

Example 2 Y-Dimethylaminopropyl-4-cyanopropyl ether

(CH 3) 2 N (CHR)) ^ OCti2CHöN

Λ 206.2 g of 3-dimethylamino-1-propanol are heated, as above, with 11 g of meta-acrylonitrile in the presence of 10 ml of Triton B for 10 hours at 68 ° G. The catalyst is neutralized with 5 ml of glacial acetic acid, extracted with water and dissolved in 300 ml of chloroform, evaporated and distilled to give 133.8 g (3-3.3%) of a gas chromatographic product of more than $ 95, m.p. is 109 ° C / 9 torr.

Example 3β-Dimethylaminopropyl- (2) -3-cyanoethyl ether

(CH.) NNCiIo0II0CIioCHoCN

O c ^ | Ä · CH3 9,67715

To a mixture of 268.0 g of 1-dimethylamino-2-propanol and 22 ml of 20% sodium hydroxide solution is added dropwise over 1 hour 166 g; g of acrylonitrile at 55-60 ° C and then the mixture is allowed to react for 1 hour at 55 ° C. Add a further 5 nil of 20% xsts-KaOH and k? g of acrylonitrile, is allowed to react at 55 DEG C. for a further hour, then dissolved in 100 ml of toluene, washed with a small amount of water, evaporated and distilled. Yield 326.2 g (80.3%), m.p. 103 ° C / 10 torr.

Example β-Dimethylaminoethyl Y-aminopropyl ether (CH-5) 2kch2ch2ogh? Ch2ch2nh? 156 kg of N-dimethylaminoethyl N-cyanoethyl ether Hydrate in the presence of 550 ml of ethanol, 150 g of gaseous ammonia and 8 g of Raney nickel in an autoclave at 120 ° C and 135 atmospheres.

After 30 minutes, a pressure constant is reached. Distillation of the dehydrated solution gives up to 9.9 g (88.2%) of product, m.p. is 78 ° C / 10 torr.

Example 5 X-Dimethylaminopropyl-Y-aminoisobutyl ether (CH 2) 9 NCl 10 CH 0 CH 10 CHOCHCHNHO J d t-d d ΰ. I <- C- CH3 10? g of N-dimethylaminopropyl / 3-cyanopropyl ether are hydrogenated, as in Example k, in the presence of 3 .mu.l of ethanol, 100 g of KII and 8 g of Raney nickel at 120 [deg.] C. and 120 atmospheric pressure . Distillation gives 36 g (82.7%) of product, m.p. is 95 ° G / 8 torr. The gas chromatographic product is uniform.

Example 6/3-Dimethylaminopropyl- (2) -Y-aminopropyl ether (GH3) 2NCH2CHO (CH2) 2NH2. 157.8 g of (h, -dimethylaminopropyl- (2) - / 3-cyanoethyl ether are hydrogenated, as in Example k, in the presence of 250 ml of isopropanol, 160 g of NH 4 and 15 g of Raney nickel 105 ° C and 110 atmospheres Distillation gives 151.7 E (9k, 7%) of a gas chromatographically uniform product with a boiling point of 82 ° C / 11 torr.

Example 7

Acetic acid β-dimethylaminoethyl ester (CII -,) 0NGH CH 0CO0CH

-J <- d. d *) To 6771 5 10 133.6 g of 2-dimethylaminoethanol are added dropwise over 20 minutes, while cooling gently, 168.5 g of acetic anhydride. The temperature then rises from? 0 ° C to a maximum of 105 ° 0. Hold at 100 ° C for 30 minutes, allow to cool, add 50 ml of GHGl 2 and neutralize the acetic acid formed with 30 ml of 20% NaOH solution while cooling at 30-35 ° C. Separate the two phases, wash the organic phase with a small amount of water, evaporate and distill off the residue. Yield 151.7 g (77.7 b.p. 1 ° C / 2.5 torr. Example 8)

Acetic acid - dimethylaminopropyl ester (ch3) 2n (ch2), ococh3d, d g of 3-dimethylamino-1-propanol and id, 3 g of acetic anhydride are reacted and further treated according to Example 7. Yield id ·, 9 g ($ 73.1), b.p. 53 ° 0/12 torr. The product is gas chromatographic uniform.

Example 9

Propionic acid X-dimethylaminopropyl ester (CH 2) p N (CH 2) 2 O / CO 3 Htj 10.8 g of 3-dimethylamino-1-propanol and 12.1 g of propionic anhydride are reacted and further treated according to Example 7. Yield 9.6 g ($ 58.1), m.p. 85 ° C / 20 torr.

Example 10

Isobutyric acid (2) -N-dimethylaminopropyl ester (ch3) 2NCH2ai 0C OOH (c d3) 2 OH3

To a mixture of 103 g of 1-dimethylamino-2-propanol in 200 ml of chloroform is added dropwise a solution of 107 g of isobutyric acid chloride in 150 ml of CHCl 3. The reaction is exothermic and the mixture boils on its own under reflux. Allow to react for d5 minutes, add dropwise, while cooling at 25-30 ° C, 210 ml of 20% NaOH, separate the phases, wash with 100 ml of water and evaporate. The residue is distilled to give 127.7 g of product (7d, 0%), m.p. 7 ° C / 18 torr.

Example 11

Lauric acid X-dimethylaminopropyl ester (C H 3 (CH 2) 30 C 0 (GH 9) 10 CH.

According to Example 10, 72.2 g of 3-dimethylamino-1-propanol and 153.1 g of lauric acid chloride in a total of 250 ml of CHCl 3 are prepared and neutralized id? ml of 20 of NaOH. Yield 157.2 g 11 ($ 82.1), m.p. 110 ° C / 0.1 torr. 67715

Example 12

Benzoic acid N-dimethylaminoethyl ester (CH3) 2NCH2CH2O30-

Prepare according to Example 10 from 89.1 g of 2-dimethylaminoethanol and 1 x 0.5 g of benzoyl chloride in a total of 300 ml of CHCl 3; neutralized with 210 mL of $ 20 NaOH. Yield 187.7 g ($ 97.1) of gas chromatographic uniform product; B.p. 127 ° C / 9 torr.

Example 13 N-Phenylcarbamic acid - dimethylaminoethyl ester • a · (CH,) 2NCH2CH2CONH- / y ~ · · - *

128 g of phenyl isocyanate are added dropwise to 96 g of dimethylaminoethanol while cooling at 60 [deg.] C. over a period of +5 minutes. After 30 minutes at 65 ° C, the low-boiling parts are removed at a pressure of 0.02 torr and a bath temperature of 90 ° C. The residue 218.1 g ($ 97.6) is a bright yellow liquid and consists essentially of the ester shown above. Titration: 1 equivalent = 208.1 + g (Theoret.208.3). IR spectrum 3320 cm-1 NII, 1720 cm-· * "0 = 0; between 2000 and 2500 cm-" there are no streaks i.e. no isocyanate is present. A small amount, 5-10 g, is distilled in a ball tube at 135 ° C / 0.015 torr, most of which decomposes on distillation.

Example 1 * + N-Cyclohexylcarbamic acid X-dimethylaminopropyl ester • - · (CH 2) 9 N (CH 2), 00CNII- /. 77.3 g of 3-dimethylamino-1-propanol are reacted, in accordance with Example 13, with 9 + g of cyclohexyl isocyanate. Distillation of the reaction product gives 153.0 g ($ 92.8) of a gas chromatographically uniform product, m.p. is 105 ° C / 0.015 torr. IR spectrum: 3320 cm-1 NH, 1700 cm-1 C = 0, no streaks between 2000 and 2500 cm-1. Example 15 N-Butylcarbamic acid (2) - [3-dimethylaminopropyl ester CH7 18 (CH2-CHCHCNH (CH) 12 6771] 71.8 g of 1-dimethylamino-2-propanol are reacted, according to Example 13, 69, With 0 g of butyl isosanate Distillation gives 113.5 g (8.2%) of product with a boiling point of 72 DEG C./0155 Torr. "NH, 1700 cm-^ C = 0, no streaks between 2000 and 2500 cm-· * ·.

Example 16

Toluene-2, M-N, N'-bis- (carbamic acid / 3-dimethylamino-ethyl ester (OH 2) 2 NCH 2 CR 2 OOCNH- 5%. NHCOOCH 0 CH (CH 2) 2 'n / xch 3 71.3 g 2-Dimethylaminoethanol and 69.6 g of toluene-2, '+ - diisocyanate are reacted according to Example 13 at 70 [deg.] C. to give 138.8 g of crude product, 125.1 g of recrystallization from 500 men of acetonitrile} yield 96.2 g (75.8%), mp 112-113 DEG C. Example 17 K-diethylcarbamic acid [3-dimethylaminoethyl ester (CH3) 2KCH2GH2OOON (GgHj) in 2,500 ml of a solution consisting of 99 g phosgene and toluene, a further 500 ml of methylene chloride are added and a solution of 178 g of dimethylaminoethanol and 300 g of triethylamine in 500 ml of methylene chloride is added dropwise at 10-20 [deg.] C. over a period of 2 hours at reflux. Distill under high vacuum to give 136.5 g (72.5%) of product, b.p. 63-72 ° C / 0.01 torr, whose NMR spectrum confirms the above structure.

Example 16 H- (n-Butyl) -K- (3-dimethylaminopropyl) urea (CH) 2 NHCH 2 CH 2 CH 2 NHCO 3 NH (CH 2) 2 CH 3 With stirring and cooling at 55-60 ° C, 51.1 g of freshly distilled liquid are added dropwise. 3-Dimethylamino-1-propylaramine in an N-atmosphere k9.5 g of freshly distilled butyl isocyanate (15 minutes). Allow to react for 1 hour at 60 ° C, after which the low-boiling parts are removed in a 0.1 torr woman at a bath temperature of not more than 1 ° C. 93.7 g (98%) of product with the above structure are obtained. Titration: 1 equivalent = 203.3 g (Theoretical 201.3) ·

Analysis for C 19 H 19 N 2 O 2 (M = 201.31) calculated: C 59.66 H 11.51 N 20.87 found: C 59.57 H 11.71 N 20.57

II

6771 5 13

Example 19 N-Phenyl-N '- (β-dimethylaminoethyl) urea (CH) 2KCH 2 CH 2 NH-CO-KH- / y

Dissolve 88 g of dimethylaminoethylamine in 500 ml of toluene and add dropwise over 10 minutes 119 g of phenyl isocyanate, the temperature rising to 97 ° C. Boil for 3 hours under refrigeration; on cooling, the product crystallizes. The mixture is filtered off and the wet product is recrystallized from 1000 ml of ethyl acetate.

Yield 135 g (65.1 / £); mp 13-1-13-2 ° C.

Example 20 N- (n-butyl) -N-cyanopropyl) -N'- (% -dimethylaminocoropyl) urea (cm 3) 2k (ch 2) 3 'N'I-CONH (CH 2), CH 3 NC-CfICIL, To 169.3 g of N- (β-cyanopropyl) -dimethylaminopropylamine dissolved in 500 ml of methylene chloride, a solution of 99.1 g of butyl isocyanate in 100 ml of methylene chloride is added dropwise under UO atmosphere, Within 1 hour. It is then refluxed for 2 hours, evaporated and the residue is treated under high vacuum at 30 ° C to remove all low-boiling parts. 2J + 9.2 g (90.8%) of oil are obtained. Titration: 1 equivalent =? 6.1L (theoretical 268.3 ·).

Analysis C H N 0 (H = 268.3-1) calculated: C 62.65 H 10.52 N 20.88 found: C 62.5 H 10.5 N 20.6

Example 21 N, K'-Dimethylaminopropylurea (CH 3) 2 N (C 12) 3 NH-CO-NH (CH 2) 3 N (CH 2) 2

A mixture of 20 * + g of dimethylaminopropylamide and 60 g of urea is gradually heated to 130 ° C over 2 hours and kept at this temperature overnight. A clear solution is formed from which NH-gas is cleaved off. It is then further heated for 5 hours at 200 ° C and the mixture is distilled after cooling. Yield 126.1 g (53-, 8 fo) of urea having the above structure; B.p. 18-185 ° C / 0.1 torr.

6771 5 14

Analysis Ο- ^ ΙΙ ^ Κ ^ Ο (M = 230.3ο) calculated: C 57.36 H 11.38 N 2 * +, 32 found: C 57.2 H 11.3 N 2 ^ +, 2

Example 22

Hexamethylene-N, N-bis- (N-dimethylaminopropyl) urea (CH) 2N (C1-6) .KHC ONH (GH2) gNHCONH (CH2) (CII-,) 2

To a solution of 168.2 g of hexamethylene diisocyanate in 1000 ml of methylene chloride is added dropwise 20' * +, 3 g of dimethylaminopropylamine and the mixture is refluxed overnight. The crystals then separate, which are filtered off with suction at room temperature, washed with CH 2 Cl 2 and dried. Recrystallize from a mixture of 1000 ml of acetone and 800 ml of ethanol to give 221.0 g ($ 59.3) of product, m.p. is 159 ° C. Titration: 2 equivalents = 376.7 g (theoretical 372.6).

Example 23/3-di me my style! no e style carbonate Γ (οηο2νοη? οη2ο- 2co by means of an 80 cm high packed column with adjustable column head, distill from a mixture of 113 g of diethyl carbonate, 17'3 g of 2-dimethylaminoethanol and 0.66 g of K0H ethanol is slowly removed to give 163 g of crude product, which is distilled to give 82 + g of a mixture boiling in the range of 38-120 ° C per liter.

77 g of this mixture are obtained by redistillation on a rotary belt column, 1.7 g of product, m.p. is lll ° C / l! r tower. Titer: 1 equivalent = 101.6 g (Theoretical 102.1). The NMR spectrum confirms the above structure.

Example 2b β-Dimethylaminoethyl-N-dimethylaminopropyl ether (ch 2) 2 N 2 O 2 -ch2och 2 g 2 N 2 (ch 3) 9158 g of β-dimethylaminoethyl-Y-aminopropyl ether prepared according to Example * + are added dropwise, while cooling, 250 g formic acid. Then, within one hour, 187 ml of a 38% aqueous formaldehyde solution at 55-65 ° 0 are added, whereby CO 2 is cleaved off. The internal temperature is then gradually raised to 11 ° C, stirred for a further 17 hours, then 2? * + G of conc. HCl and evaporate on a rotary evaporator. A solution of 125 g of NaOH in +00 ml of water is added, after which the amine separates as an oil. It is separated and the aqueous phase is extracted 6771 times with 50 ml of toluene each time. Distillation of the extracts and the amine gives 101 kg (53.2%) of pure amine, m.p. is 110 ° C / 13 mbar. The pre-distillate still contains amine. No NH band above 3000 cm-1 is detected in the IR spectrum of the pure amine.

Example 25/3-Dimethylaminopropyl- (2) -Y-dimethylaminopropyl ether (CH3) oNCH2CHOCH2CH2CH2N (ch3) 2 CH3 39.7 g of -dimethylaminopropyl- (2) -Y-aminopropyl ether are reacted and further treated as in Example 23. , using 71 g of formic acid, 53 ml of $ 38 formaldehyde, 63 g of conc. HCl and 75 g of NaOH dissolved in 300 ml of water. The amine is extracted with toluene, after which the extract is distilled. 3.1 g of a chromatographically uniform amine are obtained, m.p. is 110 ° C / 20 mbar.

Example 26

Benzyl Y-dimethylaminopropyl ether • s * • ζ ^ .- ch2och2gh2gh? N (ch3) p 77 g of benzyl Y-aminopropyl ether are reacted and further treated as in Example 23 using 107 g of formic acid, 80 ml of $ 38 formaldehyde, 38 g conc. HCl and 35 g NaOH dissolved in 350 lanes of water. The amine is extracted and then distilled. 55.6 g (6.1 l, 8%) of pure amine are obtained, m.p. is 133 ^ 0/20 mbar. No NH band above 3000 cm 2 is detected in the IR spectrum.

Example 27

Cyclohexyl-N-dimethylaminopropyl ether / h 2 -ogh 2 CH 2 g 2 N (ch) 180 g of cyclohexyl-4-aminopropyl ether are reacted and further treated as in Example 23 using 250 g of formic acid, 190 ml of 38%. formaldehyde, 113 g conc. HCl and 66 g of NaOH dissolved in 200 ml of water. Distillation gives 121.5 g (60.2%) of a gas chromatographically uniform amine, m.p. is H5 ° C / 18 mbar.

Example 28

Dodecyl-Y-dimethylaminopropyl ether 16671 CH3 (CH2) 110CH2CH2CH2N (CH3) 2191 g of dodecyl-Y-aminopropyl ether are reacted and further treated as in Example 29- using 130 g of formic acid, 136 ml of $ 38 formaldehyde , 8l g conc. HCl and 98 g of NaOH dissolved in 500 ml of water. A mixture of butanol and hexane is used to extract the amine. Distillation gives 99.6 g (9-8.9%) of a gas chromatographic uniform amine, m.p. is 130 ° C / 0.06 mbar.

Example 29

Undecyl (2) -X-dimethylaminopropyl ether ch3 (ch2) qchoch2ch0ch2n (ch3)? ck3 70.3 g of undecyl- (2) -N'-aminopropyl ether are reacted and further treated as in Example 29-, using / 0 g formic acid, 53 38% formaldehyde, 12 g conc. HCl and 23 g

NaOH dissolved in 350 ml of water. The amine extraction is performed with 3 portions of butanol, each of 100 ml. Distillation gives 37.8 g (9-7.9%) of the amine, m.p. is 110 ° C / 0.06 mbar.

Example 30 1,9-Cyclohexyl-di- (Y-dimethylaminopropyl) -ether (ch3) 2nch2ch2ch2o- ^ h ^ .- and och2ch2gh2k (ch3)? 66.1 g of 1,9-cyclohexyl-di- (X-aminopropyl) -ether, which contains a small amount of 9-hydroxycyclohexyl-γ-aminopropyl ether due to incomplete cyanoethylation and hydrogenation, are reacted and further treated as in Example 2), using 132 g of formic acid, 100 ml of 38% formaldehyde, 60 g of conc. HCl and 33 g of NaOH dissolved in 250 any water. After evaporation, 77 g of crude amine are obtained. Distillation on a packed column gives a gas chromatographically uniform diamine, b.p. is 89 ° C / 0.005 mbar.

Example 31

Terephthalic acid di- (Y-dimethylaminopropyl) ester (CH3) 2NCHpCH2CH200C- · ^ C00CH2CH2CH2N (CH3) 2

To a solution of 8.9 g of 3-dimethylamino-1-propanol in 9-50 ml of chloroform is added dropwise at 9-5-50 ° C a solution of 6 g of terephthalic acid chloride in 200 ml of CHCl 3, whereby the crystals separate.

II

17 6771 5 watts. Allow to react for 15 minutes at an internal temperature of 25 °, then add dropwise 132 ml of 20% NaOH solution, whereupon the crystals dissolve. The organic phase is separated, then evaporated and distilled to give 65 g of pure amine (65.5 / h), b.p. 157 ° C / 0.01 + mbar.

Example 32

Adipic acid di- (-dimethylaminoethyl) ester (CH 2) 2 NH 2 CK 2 OC- (CH 2 Cl 2 COOCH 2 HgN (CH 2) 2)

To a solution of 89 g of dimethylaminoethanol in +00 ml of OHCl is added dropwise at 5-5-50 ° C 91.5 g of adipic acid chloride dissolved in> 4-00 no CHCl 3. 220 ml of 20% NaOH solution are then added dropwise at 25 [deg.] C. and the organic phase is separated. Extract 3 times with 100 ml of CHCl 3 and evaporate to give 1 g of crude product and distillation to give 76.3 g (53%) of pure product, m.p. is 160 ° C / 0.03 mbar.

Example 33

Dodecanedioic acid di- (-dimethylaminopropyl) ester CH-, CH.

| 3 | J

(CH) 2NCH2CH00C- (CH2) 10-C00CHCH2N (-CHY2

To a solution of 51.6 g of 3-dimethylamino-2-propanol in 250 ml of CHCl 3 is added dropwise at 5-5-50 ° C 66.8 g of dodecanedioic acid chloride dissolved in 350 ml of CHCl 3. 110 ml of 20% NaOH are then added dropwise at 25 [deg.] C., the organic phase is separated off, the aqueous phase is extracted twice with 100 ml of CHCl3 and all the organic phases are evaporated together (97 * + g ). Distillation of 92 g gives 50.6 g (53.5%) of a gas chromatographic uniform amine, m.p. is 163 ° C / 0.03 mbar,

B) Use example I

The dimethylamino derivatives shown in Table I below are mixed with a liquid epoxide resin based on bis-phenol-A and epichlorohydrin (epoxide content 5.5-Val / kg; viscosity according to DIN 530l5 at 25 ° 0 at 10,500 mPaS). The concentration of the dimethylamino derivative is given in parts by weight per 100 parts by weight of the epoxy resin.

The strength of the adhesive bond is determined by measuring the tensile shear strength according to DIN 53283 with ground and degreased Antikorrodal 100-B test specimens with an overlap of 12 mm. Curing time: 3 hours at 100 ° C.

18 6771 5

The clotting time was determined at 120 ° C with sample volumes of about g-g on a thermostated heating plate.

D in the tables represents a (CH3) 2N group.

Table I

Dimethylamino derivative Amount Coagulation time Tensile strength min. sec. (N / mm2) D (CH2) 2O (CH2) 3NH2]>, 3 2 UO 12.9 D (CH2) 2O (CH2) 2CN 16 2 55 21.0 D (CH2) .0GH „CH (CH.) CN 19.2 h 30 15.8 D (CH2) 3OCH2CH (CH3) CH2NH2 17.0 2 b5 18.7 D (H2CC (GH3) 2CH2O (GH2) 2CN 15.5> 210 min 12, dch2ch (gh3) o (ch2) 2cn 17.6 10 0 16.1 DCH2GH (CH3) 0 (CH2) 3NH2 15.7 ^ * + 0 18.3 D (CH2) 3-O-CH2- <ö> 21.6 8 50 19.2 d (ch2) 3-o- (h) 20.8 7 25 18.5 D (CH2) 3-O-CH (CH2) gCH3 29.3 33 15 l * +, 2 DCH2-CH-O - (CH2) 3-d 10.6 6 35 15-, 3 iii3 D (CH2) 2-O- (CH2) 3-D 9.8 5 55 16.3 D (CH2) 3-0 - <(h ) -O- (CH 2) 3 -D 16.1 7 - 11 +, 1 + D (CH 2) 20 COCH 3 1 ^, 8 15 50 17.9 D (CH 2) 30 COCH 3 1 ^, 2 8 50 20.9 "10 .7 10 i + 0 19.0 D (GH9) 30CO2H5 15.6 10 10 21.2 D (CH9) 30CO2H ^ 11.7 8 50 18.8 D (CH2) 30CO-CnH23 32.2 19 0 23, 0 6771 5 19

Table I (cont.)

Dimethylamino derivative Amount Thaw time Tensile shear ^ strength min. sec. (N / mnr) dch2ch (ch3) ocogh (ch3) 2 19.5 9-6 0 19.9 D (CH2) 20CO6H ^ 16.1+! 5 o 23.2 D (CH2) 30CC- <o) - C00 (CH2) 3D 19.0 6 25 13.8

DCrL-CHOCC- (CHn), -C00-CHCHo-D

2 | 2 10 I 2 CH3 CH3 I 22.5 18 05 19.8 ΰ (0Η2) 900α (0Η2), ^ - 000 (0ϋ2) 2ΰ 16.3 10 30 22.0 d (ch2) 2nhconhc6h ^ 23,! + 2 55 15.5 GONH-nO 2 Hg D (CH 2) 3 N 30.2 12 O 16.2 xch 2 ch (ch 3) cn | d (CH 2) 3 NH 3 CO 13 13.0 2 15 12.6 [D (CH 2) 3 NHCONH 2 (CH 2) ) 6 15.8 2 1 + 0 i * +, 5 D (CH2) 20CON (C2H5) 2 13.8 25 20 18.0 D (CH2) 20GNHC6H ^ 17.6 8 50 19.5 D (CH2) 3OCONHCgH11 25.7 7 30 19.0 DCH2CHCCH3) OCONHCl + H9 22.8 19 O 23.1 2, + + toluylene] jNHC00 (CH2) 312 19-, 9 7 20 19-, 7] p (CH2) 2o32CO11 .5 8 20 16.7 12.5 1 35 16.1+ d (ch2) 3nh2 io i 50 15.0 (comparison) 5 3 25 12.6 20 6771 5

Use example II

The dimethylamino derivatives shown in Table II below are mixed with a liquid epoxide-phenol-novolak resin having an epoxide content of 5.68 Val / kg. The concentration of dimethylamino derivatives is given in parts by weight per 100 parts by weight of epoxy resin.

The experimental conditions in the adhesive bond strength and clotting time tests are similar to those in Use Example I.

Table II

Dime style mi no derivative Quantity Coagulation time Tensile strength min. sec. (N / mm2) D- (CH2) ^ - NH2 (comparison) 10.5 - 55 10.7 D- (CH2) 3-OCH2- <0> 22.7 3 20 12.1 d- (ch2) 3 -o-ch-ch9-d 11.1 2 W5 9.0 in3

0 0 H - II

D- (GH2) 3-O-C- <Q> -C-O- (GH2) 3-D 20.0 3 20 15.8 o | d-ch2-ch-o-c12 (ch2) 10-23 , 7 11 25 13.3 ch3

Use example III

The dimethylamino derivatives given in Table III below are mixed with a liquid technical grade tetrahydrophthalic acid diglycidyl ester (epoxide content 6.1 Val / kg; viscosity 600 mPa.s / 25 ° C).

The concentration of dimethylamino derivatives is given in parts by weight per 100 parts by weight of epoxy resin.

The experimental conditions in the adhesive bond strength and clotting time tests are similar to those in Use Example I.

II

Table III 6771 5

Diraethylamino derivative Amount Coagulation time Tensile strength __ min. sec. (N / mm2) D- (CH2) 3-NH2 (comparison) 11.3 3 - 13.2 0 d- (ch2) 3-hn-c-nh (ch2) 3-d lU-, 7 1+ - 15? D- (CH2) 3-O-CH-CH2-D 12.0 3 50 10.8 CH2? H3 and D-CH2-CH-O-Cl2 (CH2) 10-25, * + 17 20 12 , 8- 0

Use example IV

The dimethylamino derivatives shown in Table IV are mixed with liquid, technical grade hydantoin diglycidyl ether (epoxide content 7.2 Val / kg; viscosity 1250 mPa.s / 25 ° C).

The concentration of dimethylamino derivatives is given in parts by weight per 100 parts by weight of epoxy resin.

The experimental conditions in the adhesive bond strength and clotting time tests are the same as in Use Example I.

Table IV

Dimethylamino derivative Amount Coagulation time Tensile strength min. sec. (N / mm 2) D- (CH 2) 2 --NH 2 (comparison) 13.3 1 11 11.3 D- (CH 2) 2 -O- (CH 2) 2 CN 21.3 2 25 10.3 D- (CH 2) 3-O-CH2-Q> 28.8 9 20 8.9 D- (CH2) 3-O-CH-CH2-D 1 * +, 1 8 25 9.9 OH-,

0 J

D- (CH2) 2-O-C-CH3 19.7 22 - 12.2

0 II

D- (CH2) 3-O-CN- <H ^ 31 +, 3 10 - 12.2 0 0 D. (CH2) 3-0-C <> C-O- (CH2) 3-D 25.3 7 8-5 18-, 8 ch3 o] d-CH2-CH-O-O2 (CH2) 10-30.0 36 8-0 18-, 9

Claims (3)

6771 5 22 1. Curing compositions comprising (a) a polyepoxide compound having on average more than one epoxide group in the molecule, and (b) a curing agent for the preparation of cured products, characterized in that the curing agent is a dimethylamino derivative of the formula H3C \ nxr ( I) H 3 Cl 2 wherein X is 1,3-propylene or ethylene or methyl-substituted ethylene, and R corresponds to the formula O 0 "i" (CH 3) 2 N-X-OCO- (II), R CO- (III), O. o II II 2 3 II (CH3) 2N-X-OCYCO- (IV), RR NCO- (V), oo M II, (CH3) 2N-X-OCNH-Y-HNCO- (VI), -OR * (VII), o R8R9NCNR10 (VIII) too II (CH2) n-N-NHCNH- (Y-NHCNH) - (IX) or jn. -NRR10XN (CH3) 2 (X) in which R represents alkyl or unsubstituted aryl , Y is 2 alkylene or arylene, R is a hydrogen atom or is the same as 3.3 R, and R is alkyl, cycloalkyl or unsubstituted 4 23 6771 5 aryl, and R is alkyl, cycloalkyl, aralkyl, CH-CH-Z or 1 '5 R1 5 CH-CH ..- Z, where R represents a hydrogen atom or methyl and Z is CN, R2 C H 2 NH 2 or CH 2 N (CH 3) 2 / n is 0 or 1, R 10 and R 6 are a hydrogen atom and R 1 is alkyl, aryl or 3- (dimethylamino) propyl, or R 10 is a hydrogen atom, R is alkyl and R is 11-cyanoethyl substituted in the 1- or 2-position by methyl and R is cycloalkylene. Mixtures according to Claim 1, characterized in that X is ethylene or methyl-substituted ethylene and R corresponds to formulas (II) to (VII). Mixtures according to Claim 1, characterized in that X in the formula (I) is ethylene or 1,3-propylene and R corresponds to the formulas (VIII) and (IX). Mixtures according to Claim 1, characterized in that R in the formula (III) is -C 1-6 alkyl or phenyl. Mixtures according to Claim 1, characterized in that R represents a hydrogen atom and R represents C 1 -C 4 alkyl, cyclohexyl or phenyl, or R and R denote ethyl. Mixtures according to Claim 1, characterized in that R is -C 1-2 alkyl / cyclohexyl, benzyl, β-cyanoethyl, γ-aminopropyl or γ-dimethylaminopropyl. Mixtures according to Claim 1, characterized in that Y represents C 1 -C 4 alkylene, phenylene or 2,4-toluene. Mixtures according to Claim 1, characterized in that R and R are a hydrogen atom and R is -C 1 -C 2 alkyl or C 1 -C 2 aryl. Mixtures according to Claim 1, characterized in that R is a hydrogen atom, R n -butyl or phenyl 3a R is methyl-substituted B-cyanoethyl in the 2-position. Mixtures according to Claim 1, characterized in that the dimethylamino derivative of the formula (I) is (CH 3) 2 NHCH 2 CH 2 OCH 2 CH 2 CN, (CH 3) 2 NHCH 2 CH 2 OCOCH 3, (CH 3) 2 NHCHCH 2 CH 2 CHCONHC 6 H 5, (CH 3) 2 NHCH 2 CH 2 (CH 2) 2 CHCH ^ Ol 2CO.2 24 6771 5 A process for the preparation of polyethoxide (a) a polyepoxide for the production of an epoxide group of a molecule and (b) a process for the preparation of a product, the conversion of which results in the form of I) h3c // i is selected from X and 1,3-propylene or ethyl or methyl substituted ethyl, and R is a compound of formula 0 0 11 l "(CH3) 2N-X-OCO- (11), R CO- ( III), 0. o Il II 2 3 II (CH3) 2N-X-OCYCO- (IV), RR NCO- (V), 0 0 π II 4 (CH3) 2N-X-OCNH-Y-HNCO- ( VI), -OR (VII), 0 oq ^ m RR NCNR (VIII) ff 0 o II (CH3) 2N-X-NHCNH- (Y-NHCNH> ^ · (IX) or -OR11OXN (CH3) 2 ( X) i is R is a substituent alkyl or a substituent aryl, Y is an alkylene 2 or an aryl, R is an alkyl atom or a substituent decamma som 1 2 3 II 3 R, and R is a substituent alkyl, cycloalkyl or a substituent aryl, och 2 R is alkyl, cycloalkyl, aralkyl, CH - CH-Z or CH-CH0-Z, i vilken '5' s z R R 3 R is selected from methyl or Z and CN, CH2NH2 or